The variable is a way to customize a few rules at once. There are two levels of variables: local (prefix '#') and global (prefix '@').
The local variable can be used within single project only when global one is available for all projects.
There is list of options, settings, and properties where variable can be used instead of constant:
To use variable just enter the full variable name instead of constant. For example:
The export and import functions helps your team to share variables or even store them to version control system.